\begin{tikzpicture}
    \tkzDefPoints{0/0/B, 3.5/0/C, 2.2/2/A}

    \tkzDrawPolygon(A,B,C)
    \tkzLabelPoints[above](A)
    \tkzLabelPoints[left](B)
    \tkzLabelPoints[right](C)
\end{tikzpicture}

